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253 Mathilde (A885 VA)
Classification: Main-belt Asteroid          SPK-ID: 2000253
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 223 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2634149691984642 1.4188e-08  
a 2.648759426821981 3.9039e-09 au
q 1.951036543991528 3.5786e-08 au
i 6.740863012290864 3.3691e-07 deg
node 179.5302730108842 3.0195e-06 deg
peri 157.7711558014393 4.1278e-06 deg
M 220.5326944587648 2.7183e-06 deg
tp 2460006.503194994381
(2023-Mar-03.00319499)
1.2928e-05 TDB
period 1574.570823934427
4.31
3.481e-06
9.53e-09
d
yr
n .228633729602875 5.0546e-10 deg/d
Q 3.346482309652435 4.9322e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4743  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      49508 days (135.55 yr)  
   first obs. used      1885-12-01  
   last obs. used      2021-06-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42669  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:47:20  

Additional Information
 Earth MOID = .943311 au 
 Jupiter MOID = 2.07597 au 
 T_jup = 3.331 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.38   n/a MPCxxxxx  
diameter diameter 52.8 km n/a n/a Yeomans E-mail 2001-Apr-04
GM GM 0.00689 km^3/s^2 0.00030 Yeomans et al. (1997) Science v.278, pp.2106-2109  
bulk density density 1.3 g/cm^3 0.2 Yeomans et al. (1997) Science v.278, pp.2106-2109 based on a nominal volume of 78000 km^3 (with lower/uppper limits of 67000/90000 km^3)
rotation period rot_per 417.7 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Mottola, S.; Sears, W.D.; Erikson, A.; Harris, A.W.; et al. (1995) Planet. Space Sci. 43, 1609-1613.]
[Pravec, P.; et al. (2005) Icarus 173, 108-131.]
geometric albedo albedo 0.0436   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 20
SMASSII spectral type spec_B Cb   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

253 Mathilde (A885 VA)          Discovered 1885-Nov-12 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A885 VA = 1949 OL1 = A915 TN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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